program Project2;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
  fin : textFile;
  n, i, j, s, t : integer;
  massx : array of integer;
  massy : array of integer;
  massa : array of integer;
  massb : array of integer;
  massc : array of integer;
  massxx : array [0..100] of array [0..100] of integer;
  massyy : array [0..100] of array [0..100] of integer;
begin
  assignfile (fin, 'input.txt');
  reset(fin);
  readln(fin, n);
  setlength (massx, 2*(n-1));
  setlength (massy, 2*(n-1));
  setlength (massa, n-1);
  setlength (massb, n-1);
  setlength (massc, n-1);


  for i:=0 to n-1 do
  begin
    if (i mod 2 <> 0) then
    begin
      read(fin, massx[i]);
      read(fin, massy[i]);
    end;
    if (i mod 2 = 0) or (i=0) then
    begin
      readln(fin, massx[i]);
      read(fin, massy[i]);
    end;
  end;

  for i:=0 to 2*(n-1) do
  begin
    if ((i mod 2) = 0) then
    begin
      massa[i div 2]:=massy[i]-massy[i+1];
      massb[i div 2]:=massx[i+1]-massx[i];
      massc[i div 2]:=massx[i]*massy[i+1]+massx[i+1]*massy[i];
    end;
  end;


  for i := 0 to n-1 do
  begin
    for j := 0 to n-1 do
    begin
      if (j>i) then
      begin
        massxx[i,j]:=(massc[j]*massb[i]-massc[i]*massb[j]) div (massa[i]*massb[j]-massa[j]*massb[i]);
        massyy[i,j]:=-((massa[i]*massxx[i,j]+massc[i]) div massb[i]);
      end;
    end;
  end;

  for i:=0 to n-1 do
    for j := 0 to n-1 do
      if (j>i) then
      begin
        for s:=0 to n-1 do
          for t:=0 to n-1 do
            if (t>s) then
            begin
              if (massxx[i,j]=massxx[s,t]) then
                if (massyy[i,j]=massyy[s,t]) then
                begin
                  if (i<>s) and (j<>t) then
                  begin
                    massxx[i,j]:=0;
                    massyy[i,j]:=0;
                  end;
                end;
            end;
      end;


  for i:=0 to n-1 do
    for j:= 0 to n-1 do
    begin
     if (j>i) and (massxx[i,j]<>0) then
     begin
       write(massxx[i,j]);
       writeln(massyy[i,j]);
     end;
    end;

  readln;
  closefile(fin);
  readln;
end.
